His exercise uses the population growth model. e population of a certain species of fish has a relative growth rate of 1.3% per year. it is estimated that the population in 2010 was 12 million. (a) find an exponential model n(e)-noet for the population (in millions) t years after 2010 n(e)-13e0.013tx (b) estimate the fish population in the year 2015. (round your answer to three decimal places.) 13.873 million fish (c) after how many years will the fish population reach 16 million? (round your answer to one decimal place.) 22.1 yr 0/3.33 points i previous answers sprecalc7 4.6.002 this exercise uses the population growth model a certain culture of the bacterium rhodobacter sphaeroides initially has 30 bacteria and is observed to double every 5 hours. (a) find an exponential model n(e) no2t/s for the number of bacteria in the culture after t hours. )30.20136 (b) estimate the number of bacteria after 13 hours. (round your answer to the nearest whole number.) 256 x bacteria (e) after how many hours will t t# 37.6 he bacteria count reach 1 million? (round your answer to one decimal place.) this exercise uses the radioactive decay model. radium-221 has a half-life of 30 sec. how long will it take for 82% of a sample to decay? (round your answer to the nearest whole number.) sec